Depending on budget I would agree about Pontus II as best bang for the buck in your system. If you can afford it the Venus II is noticeably better but only by a few percent depending on the resolution of your system.
A Lumin U1 Mini with linear power supply is more than adequate. Or the newer U2 Mini.
I have a Lumin U1 (full size) running into a Venus II into Icon Audio Stereo 300 mkII (sometimes Stereo 40 mkIV) and Forte IV speakers in my main system now. The system is more resolving and musical than you could ever imagine those fun speakers being capable of.